The UnsuggesterYou know those annoying Amazon notices, "if you like this, you may also like [stuff]?" Well, The Unsuggester turns it around. It finds the books you are least likely to own given that you own some book. For instance, I like Elizabeth Peters'
The Camelot Caper, so The Unsuggester thinks I'm very unlikely to own
A Million Little Pieces by James Frey -- and it's right. I wouldn't be caught dead with a book by Frey.
(link via Neil Gaiman's blog)
Of course, there's also
The Suggester. It notes that people who own
Movies in Fifteen Minutes by Cleolinda Jones (link is to Amazon.uk) are also likely to own
Claudia's Friend (Baby-Sitters Club) by Ann M. Martin. And the
Merriam-Webster and Garfield Dictionary. Hee.